Automobile door lock



March 9, 1937. H. D. GEYER AUTOMOBILE DOOR LOCK Filed Oct. 26, 1933 ATTORNEYS v 15 prevented and whereby vibration rattles Patentedl Mar.l 9, 1937 UNITED STATES"- APATENT OFFICEy '2,073,149'Y AUTOMOBILE noon Loox Harvey'D. Geyer, Dayton, Ohio,

to Generalmesne assignments, ration, Detroit, Mich. ware Application october 26,

v 3 Claims. f(

. f An object of this invention is toeliminaterattles and squeaks caused by wear and relative movement between a sliding bolt and vits stationar-y guide on the lock frame.

A more specific object is to provide a non-metallic self-lubricating cushionlining between the`r sliding locking b'olt and its stationary guide whereby wear between these parts is substantially and squeaks caused by relative movement between these parts "is eliminated. Thus when this invention isapplied to an automobile door lock the relative movement between the door and the door jamb caused by the jolting and twisting of the body frame will cause the sliding bolt to move relative to its guide but the cushion lining interposed between the boit end its guide will prevent rattles, squeaksrand wear. All automobile .owners know the great tendency to squeaks and rattles due to this cause and so far as known no one heretofore has solved the diilcult problem of preventing same. This invention provides a very simple and practical means of preventing such squeaks and rattles. l Further objects and advantages of the present invention will be apparent from the following description, reference being had to the accompanying drawing, wherein a preferred embodiment of one form of the present invention is clearly shown.

In the drawing: Fig'. 1 is a perspective view of aportion of an automobile door lock embodying this invention.

' Fig; 2 is aV plan view of the structure of Fig. .1. Fig. 3 is a side elevation thereof looking in the direction of arrow 3 lof Fig. 1. i

Fig. 4 is an elevationlooking in the direction of arrow 4 of Fig. 3.

Fig. 5 is asection on line 5-'5 of Fig. 3.

Similar reference characters refer to similar parts throughout the several views.

Numeral vIll designates anordina'ry lock frame of any suitable design and upon wlilich the moving parts of the lock are mounted, This lock 50 frame III is suitably xed to the door by screws or bolts in any suitable and 'dwell-known manner. Lock frame' III has an integral end plate I I having a rectangular'hole I2 therein through which the .sliding bolt I3 extends with suiiicient clearance A 55 as to'avoid metal to metal contact therewith.

It is especially designe-d for autoassigner, by Motors Corpoa..corporation of Belabwsalseriel` No. 695,217

The sliding bolt I3`is actuated( from its inner end by any suitable and well-known-means and hence it is deemed unnecessary to illustrate such actuating means in the drawing.

A rectangular metal guide steel, is rigidly xed to the lock frame I Il by weldi ing or by rivets. In the form shown, the guide tube I5 has an integral oilset tongue I6 riveted to the lock frame ID'by rivets I1 and alsoupper. and lower tongues I8 having holes I9 therein/by which tongues I 8 vmay be riveted o r screwed to the end plate. II. 'I 'his guide I5 and its non-metallic anti-friction cushion lining 20 constitutes the novel part of the disclosed structure.

This resilient cushion lining 2l)A comprises an vintermediate layer of fabric 2l faced on one side with a thin cushion'layer 22 of resilient rubber or the like, and on the other side with a thin'` coating 23 of a dry solidlubricating compound, both layers 22 and 23 being bonded to the fabric layer ZI and enteringA the fibers thereof. This anti-friction coating 23'preferably consists chiefly of a high viscosity cellulose nitrate and very nely divided amorphous graphite mixed therein to form a homogeneous mixture. In making such a hard dry solid anti-friction viscosity cellulose nitrate having a viscosity of tube I5 of substantial length, preferably formed-of pressed sheet compound, high 14 seconds Hercules or higher is dissolved in a graphite as dry cellulose nitrate by weight. This compound may be applied evenly to the fabric 2| by spraying or b ybrush and thesolvent permitted to dry, which leaves the hard dry anti-friction coating 23 strongly bonded to the fabric. erably the layer 22 of uncured soft rubber compound is applied to one side of the fabric before the above described anti-friction compound is 4applied to the opposite side. The next step is 'to compress and mold the coated sheet of fabric f' between-two polished steel plates in a press for about i'lve minutes at a pressure of about 75`0 lbs. per square inch and at a temperature vof ,about 285 F. This vulcanizes the rubber layer 22 and molds a hard smoothsurface on the antifrictionfeoating 23 and alsocauses both the rubber layer 22 and lubricant coating 23 to penetrate in'to the fabric 2l and give a strong bond thereto. The sheet thus formed is cut upto the proper dimensions and used as a lining in the metal guide tube I5, the rubber layer 22 being cemented or4 otherwise suitably attached to the inner, surface of the tube -I5 as clearly shown in Fig. 5.

Pref# The bolt la nts snugly within the ann-friction suitable resilient cushion between the bolt I3 and the metal guide I5. It is now clear that when an automobile door equipped. with this invention moves slightly relative to the door joint ldue to a jolting or distortion of the body frame, the bolt I3 will be cushioned upon the non-metallic cushion lining 20 and hence no rattles or squeaks between the bolt I3 and its lock frame can occur.

While 'the form of embodiment of thepresent invention as herein disclosed, constitutes a preferred form, it is to be understood that other forms might be adopted,`v all coming within the scope of theclaims which follow.

What is claimed is as follows:

-1. In a lock adapted for use on automobile doors, a lock Yframe, a sliding lock olt, a sta.- tionary metal guide for said lock bolt, and a nonmetallic` cushion lining bonded to said metal guide and isolating said sliding bolt and said -metal guide, lining comprising ,an intermevdiate fabric layer, an

outer cushion layer of reslient material bondedto said guide, and an inner coating of dry lubricant bonded to said fabric layer.

2. In a lock adapted for use on automobile doors, a lock frame, s. sliding lock bolt, a stationary metal guide for metallic cushion linig'bonded to said metal guide and isolating said sliding bolt and said metal guide, said lining comprising an intermediate fabric layer, an outer cushion layer of resilient rubber, and an inner coating of dry lubricant upon said fabric layer.

3. In a; lock adapted for use` on automobile doors, a lock frame, a sliding lock bolt, a stationary metal guide `for said lock bolt, and a nonmetallic cushion lining bonded to said metal guide and isolating said sliding bolt `and said metal guide, said lining comprising an outer cushion layer of resilient rubber surface-bonded to said metal guide, and a dry lubricating coating bonded to Vsaid rubber layer.

y HARVEY D. GEYER.

said lock bolt, and a non- 

